28743508 has 18 divisors (see below), whose sum is σ = 51409946. Its totient is φ = 14061648.

The previous prime is 28743499. The next prime is 28743511. The reversal of 28743508 is 80534782.

It can be written as a sum of positive squares in only one way, i.e., 28708164 + 35344 = 5358^2 + 188^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7210 + ... + 10462.

Almost surely, 2^28743508 is an apocalyptic number.

It is an amenable number.

28743508 is a deficient number, since it is larger than the sum of its proper divisors (22666438).

28743508 is a wasteful number, since it uses less digits than its factorization.

28743508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3351 (or 3302 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 28743508 is about 5361.2972310813. The cubic root of 28743508 is about 306.3232234740.

The spelling of 28743508 in words is "twenty-eight million, seven hundred forty-three thousand, five hundred eight".